Road grader



F.'B.'KING.

ROAD GBADER. l APPLICATION FILED AuGIIg, m2o.

1,41 3,664 Y Patented Apr. 25, 1922.

2 wars-SHEET I. Q

F. B,l KING.

ROAD GRADER.

APPLICATION FILED Aue.19, |920.

1,413,664- y Patented'Apr25, 1922.

2 SHEETS-SHEET 2.

l n uc nfoo /wfff A my.

PATENT orifice.

FRANK B. KING, 0F GUTHRIE, OKLAHOMA.

Roan GRADE.

specification of Lttersratent. Patented Apr. 25, 1922.

Application led August 19, 1920. Serial No. 404,537.

To ait whom 'it may concern:

Be it known that I, FRANK B. KING, a citizen of the Unlted States,residing at Guthrie,

in the county of Logan and State of 0kla homa, have invented certain newand useful Improvements in Road Graders; and I do declare the followingto be a full, clear, and exact description of the invention, such aswill enable othersr skilledin the art to which it appertains to make anduse the same, reference being had tothe accompanying drawlngs, and tothe letters and figures of reference marked thereon, which form a partof this specification.

This invention relates to a roadv grader particularly applicable forgrading streets or roads between curbs or forms and the inventioncontemplates the provisionof means whereby the surface may be graded toa proper predetermined depth and cross section below the curb, coping orforms.

In the illustrated embodiment of my invention I have shown a surfacecutter and ay sub-soil cutter driven at approximately the same speed anddelivering material to a conveyor or elevator which may transpose it tothe sideof the road bed beyond the curb.

I have shown means for intermittently driving the machine, said meansbeing effective in imparting a continuous rotative motion to the surfacecutter and sub-soil cutter, the mechanism being Such that at regularintervals the machine will move forward and f stop, the cutters all thewhile continuing to rotate, however, so that the grading of the road bedmay be elicently and advantageously effected without 'specialindividual,

attention during the grading operation.

In the drawings, Y, l Fig. 1 is a side elevat1onal vlew of a machineconstructed in accordance with my invention.

Fig. 2 is a vertical, longitudinal, sectional with bearings 10 and 11respectively, in which are mounted stub shafts carrying flange tractionwheels 12 and 13 adapted to travel over the track, curb, or coping,shown at 14 and 15 (Fig. 3) to maintain the frame yand cutters on apredetermined level as the machine passes over the road bed to begraded.

The curbing, coping, or track consisting of the members 14 and 15 islaid down in advance of the introduction of the machine over the roadbed and serves as a gauge for- 4 the cutters carried by the gradingmachine, as will appear hereinafter.

The frame 1 supports a power device or prime mover shown as consistingyof a hydrocarbon enginel, the crank shaft of which is connected to avtransmission mechanism 17 in yrear thereof, which drives a shaft 18carry- 75 ingrat one end a beveled gear 19, meshing with a complementarygear 20 on the transverse shaft 21. y v

The transverse shaft 21 drives a shaft 22 at the rear end of the framethrough the medium of an endless chain or belt connection 23 in anobvious manner., and said shaft is provided with a plurality ofsprockets 22 for driving the elevator fiights 24 in lrear of the machineand above the shoe 25 appro- 85 priately fastened to the rear of theframe through the medium of th'e tie-rods 26 and to lthe conveyor frame27. The flights 24 distribute the material on the conveyor 28 lwhichtravels transversely of the machine through the shaft 29 carrying the'gear 30 meshlng with the gear 31 on shaft 22.' The transverse conveyor28 passes over idlers in the usual manner and has aninclined branchwhich passes around a shaft 32 on which is 95 a sprocket`33 driven fromthe sprocket 34 on shaft 29 through the medium of the chainy 35. VThereis a sprocket not shownfon the opposite' side of the machinecorresponding to the sprocket 34 so that the dirt may be 100 dischargedat either side of the frame 1 by transferring a bracket arm carrying theshaft 32" and the sprocket 33 and extending the belt or conveyor 28 toaccommodate the chain. v

The shaft 21 carries a spur gear 37 meshingwith'the teeth 38 0f an idler39, which 'carries equi-distantly 4disposed toothed segments, in thepresent instance three, desig- `hated 40, 41, and 42, these being spacedaparty 110 so that at uniform intervals they will succesfsively engagethe spur gear 43 on the hub of the traction or flanged guide wheel 13,lit being understood that. duplicate 'mechanism is on the machineopposite to the side illustrated in Fig. 1 so that the machine is drivenfrom both sides.I

The spur teeth 38 of the idler 39 engage a gear 44 meshing with an idler45 of substantially the same construction as the one designated 39 butminus the segments 40, 41 and 42 and the teeth of said idler 45 meshwith a gear 46, the gears 44 and 46 being mounted on cutter shafts 47and 48 carried by bearings 49 and 50 suspended fromthe frame 1.Therefore, when the engine is operated, the shaft`21 will be rotated toimpart motion to the elevator and conveyor in rear of the machinecontinuously. At the same time the mechanism which transmits power tothe cutter shafts 47 and 48 also becomes effective inv intermittentlymoving the machine forward at regular intervals and permitting themachine to stand still during definite periods in the cycle ofoperations.

In other words, the machine moves forward a distance determined by thenumber of teeth on the segments 40, 41 and 42 and remains idle dependentupon the spaced relation between the segments, but all the while thecutters and conveyor are being contin- -uously operated. rIhe purpose ofthis is to move the machine forward and allow it to stop while thecutters are tearing away the earth to grade the road bed to the properdepth below the top of the track, curb or coping and to give time forthe material to be conveyed away from the cutters to the side of theroad bed.

I have provided a novel form of rotary cutters best shown in Fig. 4 asconsisting of a plurality of angles, there being four shown and arrangedback te back. The angles in Fig. 4 are designated 51, 52, 53 and 54 andthey are spaced apart to provide a crossshaped recess between which thecutting .elements 55 may be clamped. The cutting elements are shown asconsisting of bars having curved ends 56, the bars being clamped betweenthe backs of the angle irons to admit of adjustment in length necessarytosecure desired crown or cross section and being arranged in staggeredrelation; that is, those in one row are staggered with respect tothose'in the next succeeding row, thus requiring one complete revolutionof shaft to complete continuous cut. On the ends of the angles arefastened heads 57, to which the shafts 47 and 48 are secured. The anglesare clamped together by means of suitable fastening devices such asbolts 58 but other fastening means may be employed if desired.

By reference to Fig.'2 it will be observed that the forward orsurfaceremoving cutters have radial arms spaced about 90 apart, thelength of the arms being less than the length of the corresponding armsof the subsoil cutters in rear thereof. rIhe purpose of this is topermit the first or surface-removing cutters to remove the surplusmaterial from the surface and then permit the longer arms of thesub-soil cutters to remove the material to a greater depth. All of thematerial removed by the respective cutters, however, is passedrearwardly to the for- Vward end 59 of the shoe 25 and it is carried bythe flights 24 to the conveyer 28 and discharged to the side of themachine.

rIhe machine is designed to extend entirely across the street or roadwayor such section thereof as may be suitable to width of machine in use sothat a uniform grading may be accomplished and so that as the machinepasses along the street, the bed will be graded for the surface coveringin a convenient and expeditious manner tothe required crown and crosssection.

It will be'apparent that the machine will be entirely automatic in itsoperation, passing forward a determined distance, stopping, cutting awaythe material and conveying it to the side of the road bed, and thenprogressing for another cut.

In actual practice the segments 40, 41 and 42 will be designed tomovethe machine forwardly a distance having a definite relation to thecutters so as to insure all of the surplus earth being removed from theroad bed during its preparation.

Various changes in form, proportion and minor details of constructionmay be resorted to without essentially departing from the spirit of thisinvention, it being understood that such changes as are contemplated bythe scope of the claims may be made without departing from the spiritthereof.

By reference to the foregoing description it w1ll be apparent that thecutter knives or bars 55 may be adjusted to provide a convex surface orcrown for the roadway, a convex surface or a straight surface, theadjustability ofthe knives but affected by loosing the nuts 15 on thebolts which hold the angle irons in clamping position.

lWhat I claim and desire to secure by Letters-Patent is:

1. In a device of the class described, a

rotary cutter including transversely arranged angle irons, the flangesof which are arranged back to back to form a crossshaped recess, radialcutter bars between the flanges of the angle irons, and means forfastening the angle irons together to clamp the bars between them.

2. In a deviceof the class described, a rotary cutter includingtransversely arranged angle irons, the flanges of which are arrangedback to back to form a crossshaped recess, radial cutter bars betweenthe flanges of the angle irons, means for fastening the angle ironstogether to clamp the bars between them, and radial arms locatedLaurence` between the bars and arranged in rows, those in one row beingin staggered relation to those in the other row.

3. A cutter for rotary graders comprising a plurality of angles arrangedback to back, cutter bars clamped between the angles, bolts forfastening the angles in functional posi-l tion, a head on the end ofsaid angles, and

means on said head for rotating the same to impart motion to the cutterbars.

4. In a device of the class described, a rotary cutter including angleirons, the flanges of which are arranged back to back to form across-shaped recess, radial cutter bars longitudinally adjustablebetween the anges of the angle irons, means for fastening the angleirons together to clam'p the bars between them.

5. ln a device of the class described, a rotary cutter comprising cutterclamping bars, radial cutter bars between the clamping bars andadjustably held there between a clamping means for binding the cutterbars between the clamping bars.

In testimony whereof I alix m si nature.

FRANK lNG.

